8550515961 has 27 divisors (see below), whose sum is σ = 13379526927. Its totient is φ = 5259636720.

The previous prime is 8550515951. The next prime is 8550515971. The reversal of 8550515961 is 1695150558.

The square root of 8550515961 is 92469.

It is a perfect power (a square), and thus also a powerful number.

8550515961 is a `hidden beast` number, since 8 + 5 + 5 + 0 + 51 + 596 + 1 = 666.

8550515961 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8550515951) and next prime (8550515971).

It can be written as a sum of positive squares in only one way, i.e., 1264869225 + 7285646736 = 35565^2 + 85356^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8550515961 is a prime.

It is a super-2 number, since 2×8550515961² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8550515951) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3605106 + ... + 3607476.

Almost surely, 2^8550515961 is an apocalyptic number.

8550515961 is the 92469-th square number.

8550515961 is the 46235-th centered octagonal number.

It is an amenable number.

8550515961 is a deficient number, since it is larger than the sum of its proper divisors (4829010966).

8550515961 is an equidigital number, since it uses as much as digits as its factorization.

8550515961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4774 (or 2387 counting only the distinct ones).

The product of its (nonzero) digits is 270000, while the sum is 45.

The cubic root of 8550515961 is about 2044.8624844811.

The spelling of 8550515961 in words is "eight billion, five hundred fifty million, five hundred fifteen thousand, nine hundred sixty-one".